Always add an empty alt attribute to every spacer or decorative image you use in your website, i.e. <img src=”spacer.gif” alt=””>.
If spacer or decorative images have no alt attributes, those browsing with images off, or with text browsers, will either see or hear the file name, or the text ‘[image]’, for each image lacking an alt attribute.
Here is handy accessibility tip that will make filling in web forms easier for screen reader users, and for people with impaired motor skills: associate form fields explicitly with their labels by making use of the ‘label’ element and the ‘id’ attribute.
When encountering a form on a web page it is easy for sighted users to work out the expected response for each form element; it is just a matter of reading the label next to the field.
However, it is not always quite so simple for someone using a screen reader. It may not be clear which labels are associated with which field (particularly if the page author has used tables to layout the form, and the screen reader doesn’t understand tables).
If labels are not physically, close or clearly associated with the form element, filling in a form can be extremely difficult for screen reader users.
There is a way to explicitly relate labels with their form elements; each label can be identified with a name, and then associated with the appropriate control using the ‘id’ attribute, e.g.,
<label for="name" >Name</label >
<input name=" Name" type="text" id ="name" >
The value of the for attribute can be any text you choose – as long the appropriate id attribute has the same text. Using this technique also provides a bonus for people with impaired motor skills because it increases the ‘target area’ when assigning focus to the field, i.e. clicking the label or the field itself will focus the cursor in the text field (or check the box if it is a radio button).